iMeshbean Solar Auto Darkening Welding Helmet Arc Tig Mig Grinding Mask with Test Function & Low Battery Alarm Function American Eagle Design USA (Red) Can be used for for all modes of welding and plasma cutting, American eagle design; CE/EMC,GS and ANSI (Z87.1) approved; Solar cell backed up with lithium battery (CR2032) View size:96*48mm; Sight state shade: DIN4; Dark state shade: DIN9-13 Switching time:1/30,000S;Delay time:0.2-1S;Power supply:solar cells &Replaceable lithium cells Function: Grinding& Welding;Power on/off: Fully automatic; Eliminate long wearing uncomfortable, avoid the mask loose, let the staff in the high altitude used more securely,freely adjusting the button size to fit for different shapes of man&#039;s heads. <span class="a-text-bold">The Battery Card Slot: </span>with Backup battery . <span class="a-text-bold">Delay Time Adjuster: </span>Adjust the auto darkening welding filter from the dark to light time. <span class="a-text-bold">Sensitivity Adjuster: </span>Adjust the sensitivity according to the operation situation. <span class="a-text-bold">High Quality LCD: </span>Light evenly, image clearly. Solar Cell + 1X CR2032 installed (Replaceable) Effectively protect your eyes from sparks, spatter and harmful radiation.